SPACER FOR CABLE

• Main Authors: SAITO KOJI, IWATA HIDEYUKI, KATSURAJIMA WATARU, NISHIMURA AKIRA, NIRASAWA NOBUMASA, TSURUMI TAKEO
• Format: Patent
• Language: English
• Published: 13.09.1996
• Edition: 6
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

PURPOSE: To improve the flexibility of a spacer and to improve the workability of a laying work as well by disposing a material layer having a low coefft. of elasticity between the outermost layer and a central tension member and integrating these layers. CONSTITUTION: A high-elastic modulus thermoplastic material layer 2 having grooves forming the outermost layer of a spacer is formed in order to suppress the deformation by the side pressure acting on a cable at the time of laying the cable and to protect the inside of transmission medium housing grooves 4. The material layer 3 which is arranged between the high-elastic modulus thermoplastic material layer 2 and the central tension member 1 and has a low coefft. of elasticity exhibits the effect of suppressing the bending rigidity of the spacer to a lower level. The materials for the central tension member 1 are not particularly limited, insofar as these material has have high rigidity, for which, for example, FRP, such as aramid fiber reinforced plastic, having rigidity, steel wires, etc., are exemplified. The high-elastic modulus thermoplastic material layer 2 includes, for example, a high-density polyethylene, etc., and the low-elastic modulus material layer 3 includes, for example, a foamed polyethylene, etc.